2015 day 14
continuous-integration/drone/push Build is passing
Details
continuous-integration/drone/push Build is passing
Details
This commit is contained in:
parent
06a942483c
commit
ac4d282e1c
|
@ -19,6 +19,7 @@ public class Test2015
|
|||
[DataRow(typeof(Day11), "hepxxyzz", "heqaabcc")]
|
||||
[DataRow(typeof(Day12), "111754", "65402")]
|
||||
[DataRow(typeof(Day13), "733", "725")]
|
||||
[DataRow(typeof(Day14), "2655", "1059")]
|
||||
public void CheckAllDays(Type dayType, string part1, string part2)
|
||||
{
|
||||
Common.CheckDay(dayType, part1, part2);
|
||||
|
|
|
@ -7,6 +7,9 @@ namespace AOC2015;
|
|||
/// </summary>
|
||||
public sealed class Day13 : Day
|
||||
{
|
||||
private readonly Dictionary<(string person1, string person2), int> _happinessMap = new();
|
||||
private readonly List<string> _people = new();
|
||||
|
||||
public Day13() : base(2015, 13, "Knights of the Dinner Table")
|
||||
{
|
||||
foreach (var line in Input)
|
||||
|
@ -21,40 +24,36 @@ public sealed class Day13 : Day
|
|||
public override object Part2()
|
||||
{
|
||||
// Add myself
|
||||
foreach (var person in allPeople)
|
||||
foreach (var person in _people)
|
||||
{
|
||||
happinessMap[("me", person)] = 0;
|
||||
happinessMap[(person, "me")] = 0;
|
||||
_happinessMap[("me", person)] = 0;
|
||||
_happinessMap[(person, "me")] = 0;
|
||||
}
|
||||
|
||||
allPeople.Add("me");
|
||||
|
||||
_people.Add("me");
|
||||
|
||||
return ComputeHappiness();
|
||||
}
|
||||
|
||||
private Dictionary<(string person1, string person2), int> happinessMap = new();
|
||||
private List<string> allPeople = new();
|
||||
|
||||
private void AddToHappinessMap(string thisString)
|
||||
{
|
||||
var tokens = thisString.Split(' ');
|
||||
var firstPerson = tokens.First();
|
||||
var lastPerson = tokens.Last().TrimEnd('.');
|
||||
var person1 = tokens.First();
|
||||
var person2 = tokens.Last().TrimEnd('.');
|
||||
var amount = int.Parse(tokens[3]);
|
||||
|
||||
if (tokens.Contains("lose"))
|
||||
amount *= -1;
|
||||
|
||||
happinessMap[(firstPerson, lastPerson)] = amount;
|
||||
_happinessMap[(person1, person2)] = amount;
|
||||
|
||||
if (!allPeople.Contains(firstPerson))
|
||||
allPeople.Add(firstPerson);
|
||||
if (!allPeople.Contains(lastPerson))
|
||||
allPeople.Add(lastPerson);
|
||||
if (!_people.Contains(person1))
|
||||
_people.Add(person1);
|
||||
if (!_people.Contains(person2))
|
||||
_people.Add(person2);
|
||||
}
|
||||
|
||||
|
||||
public static List<List<string>> BuildPermutations(List<string> items)
|
||||
private static List<List<string>> BuildPermutations(List<string> items)
|
||||
{
|
||||
if (items.Count > 1)
|
||||
{
|
||||
|
@ -67,7 +66,7 @@ public sealed class Day13 : Day
|
|||
|
||||
public long ComputeHappiness()
|
||||
{
|
||||
var possibilities = BuildPermutations(allPeople);
|
||||
var possibilities = BuildPermutations(_people);
|
||||
|
||||
var maxHappiness = long.MinValue;
|
||||
foreach (var possibility in possibilities)
|
||||
|
@ -81,8 +80,8 @@ public sealed class Day13 : Day
|
|||
var leftPerson = i == 0 ? possibility[^1] : possibility[i - 1];
|
||||
var rightPerson = i == possibility.Count - 1 ? possibility[0] : possibility[i + 1];
|
||||
|
||||
thisPossibilityHappiness += happinessMap[(firstPerson, leftPerson)];
|
||||
thisPossibilityHappiness += happinessMap[(firstPerson, rightPerson)];
|
||||
thisPossibilityHappiness += _happinessMap[(firstPerson, leftPerson)];
|
||||
thisPossibilityHappiness += _happinessMap[(firstPerson, rightPerson)];
|
||||
}
|
||||
|
||||
maxHappiness = Math.Max(maxHappiness, thisPossibilityHappiness);
|
||||
|
|
|
@ -5,11 +5,36 @@ namespace AOC2015;
|
|||
/// </summary>
|
||||
public sealed class Day14 : Day
|
||||
{
|
||||
private readonly List<Reindeer> _reindeer;
|
||||
|
||||
public Day14() : base(2015, 14, "Reindeer Olympics")
|
||||
{
|
||||
_reindeer = Input.Select(i => new Reindeer(i)).ToList();
|
||||
}
|
||||
|
||||
public override object Part1() => "";
|
||||
public override object Part1() =>
|
||||
_reindeer.Select(r => r.Fly(2503)).Max();
|
||||
|
||||
public override object Part2() => "";
|
||||
public override object Part2() =>
|
||||
Enumerable.Range(1, 2503)
|
||||
.SelectMany(time => _reindeer.GroupBy(r => r.Fly(time)).OrderByDescending(r => r.Key).First())
|
||||
.GroupBy(r => r)
|
||||
.Max(g => g.Count());
|
||||
|
||||
private class Reindeer {
|
||||
private readonly int _duration;
|
||||
private readonly int _rest;
|
||||
private readonly int _speed;
|
||||
|
||||
public Reindeer(string input) {
|
||||
var p = input.Split(' ');
|
||||
_speed = int.Parse(p[3]);
|
||||
_duration = int.Parse(p[6]);
|
||||
_rest = int.Parse(p[13]);
|
||||
}
|
||||
|
||||
public int Fly(int time) =>
|
||||
time / (_duration + _rest) * _speed * _duration // number iterations * travel distance
|
||||
+ Math.Min(_duration, time % (_duration + _rest)) * _speed; // last partial iteration
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue